Structure and magnetic properties of Mn(Ⅱ)coordination polymers regulated by N-auxiliary ligands  

通过含氮辅助配体调节的锰(Ⅱ)配位聚合物的结构和磁性质

作　　者：LIU Xiaxia MA Xiaofang GUO Luxia HAN Xianda FENG Sisi 刘霞霞;马小芳;郭露霞;韩贤达;冯思思(山西工学院能源工程学院,朔州036000;山西工学院材料工程学院,朔州036000;山西大学分子科学研究所,化学生物学与分子工程教育部重点实验室,太原030006)

机构地区：[1]School of Energy Engineering,Shanxi College of Technology,Shuozhou,Shanxi 036000,China [2]School of Materials Engineering,Shanxi College of Technology,Shuozhou,Shanxi 036000,China [3]Key Laboratory of Chemical Biology and Molecular Engineering of the Education Ministry,Institute of Molecular Science,Shanxi University,Taiyuan 030006,China

出　　处：《无机化学学报》2025年第3期587-596,共10页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21671124);山西工学院博士科研启动基金资助。

摘　　要：Two new Mn(Ⅱ)coordination polymers,namely{[Mn_(2)(HL)(phen)_(3)(H_(2)O)_(2)]·7.5H_(2)O}_n(1)and[Mn_(4)(HL)_(2)(1,4-bib)_(3)(H_(2)O)_(2)]_n(2),were synthesized under hydrothermal conditions by using Mn(Ⅱ)ions and 6-(3',4'-dicarboxylphenoxy)-1,2,4-benzenetricarboxylic acid(H_(5)L)in the presence of N-auxiliary ligands 1,10-phenanthroline(phen)and1,4-bis(1H-imidazol-1-yl)benzene(1,4-bib).The structures of coordination polymers 1 and 2 were characterized by infrared spectroscopy,single-crystal X-ray diffraction,thermogravimetric analysis,and powder X-ray diffraction.Single-crystal X-ray diffraction reveals that 1 has a 1D chain structure based on binuclear Mn(Ⅱ)units,while 2 features a(3,8)-connected 3D network structure based on tetranuclear Mn(Ⅱ)units.Magnetic studies show that 1 and 2exhibit antiferromagnetic interactions between manganese ions.2 shows stronger antiferromagnetic interactions due to the shorter Mn…Mn distances within the tetranuclear manganese units.CCDC:2357601,1;2357602,2.以Mn(Ⅱ)离子和6-(3',4'-二羧基苯氧基)-1,2,4-苯三羧酸(H_(5)L)为原料,在1,10-菲咯啉(phen)和1,4-双(1H-咪唑-1-基)苯(1,4-bib)含氮辅助配体存在下通过水热法制备了2个新型锰配位聚合物{[Mn_(2)(HL)(phen)_(3)(H_(2)O)_(2)]·7.5H_(2)O}_n(1)和[Mn_(4)(HL)_(2)(1,4-bib)_(3)(H_(2)O)_(2)]_n(2)。利用红外光谱、单晶X射线衍射、热重分析和粉末X射线衍射等手段对配位聚合物1和2的结构进行表征。单晶X射线衍射结果表明,1具有基于双核锰结构单元的一维链状结构,2具有基于四核锰结构单元的(3,8)-连接三维网络结构。磁性研究表明,1和2的锰离子之间均表现为反铁磁相互作用。由于2的四核锰结构单元中Mn…Mn间距较短,所以反铁磁相互作用较强。

关 键 词：coordination polymers crystal structures binuclear Mnunit tetranuclear Mnunit MAGNETISM 

分 类 号：O614.711[理学—无机化学]